High‐performance ZnO varistor ceramics prepared by arc‐induced flash sintering with low energy consumption at room temperature  

作　　者：Angxuan Wu Zhixiang Zhu Xilin Wang Nianping Yan Hongyang Zhou Rongxia Huang Guoming Ma Zhidong Jia Liming Wang 

机构地区：[1]Engineering Laboratory of Power Equipment Reliability in Complicated Coastal Environments,Tsinghua Shenzhen International Graduate School,Tsinghua University,Shenzhen,Guangdong,China [2]State Key Laboratory of Advanced Power Transmission Technology,Global Energy Interconnection Research Institute Co.Ltd,Beijing,China [3]State Grade Jiangxi Electric Power Research Institute,Nanchang,China [4]School of Electromechanical Engineering,Guangdong University of Technology,Guangzhou,Guangdong,China [5]State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,North China Electric Power University,Beijing,China

出　　处：《High Voltage》2022年第2期222-232,共11页高电压（英文）

基　　金：supported by the National Natural Science Foundation of China(52077118);the Guangdong Basic and Applied Basic Research Foundation(2021A1515011778);the State Key Laboratory of New Ceramic and Fine Processing Tsinghua University(KFZD201903);the State Grid Cor-poration of China Headquarters Technology Project(5200‐201,940,081A‐0‐0‐00).

摘　　要：The development of ultra‐high voltage transmission lines requires a ZnO arrester with excellent electrical response and high voltage gradient.Compared with conventional preparation methods,flash sintering allows fast production of novel high‐performance ZnO varistor ceramics with low energy consumption and controlled grain growth.Herein,ZnO varistor ceramics were prepared using the flash sintering method at an air pressure of 21 kPa for 60 s at 25℃.The results showed that the flash‐sintered samples had fine grains and reduced loss of volatile elements.Moreover,the voltage gradient,leakage current density,and non‐linear coefficient of the flash‐sintered varistor ceramics were significantly improved compared with those of conventionally sintered samples.Owing to the short preparation time and absence of a heating process,the energy consumption of the proposed flash sintering method was significantly reduced to 10%of that by conventional sintering.The proposed method is a promising approach for the preparation of ZnO arresters with excellent electrical properties and serves as an effective method that realises energy saving and emission reduction.

关 键 词：CERAMICS VARISTOR preparation 

分 类 号：TQ174[化学工程—陶瓷工业]